Microwave Sintering of Ni-Based Bulk Metallic Glass Matrix Composite in a Single-Mode Applicator

Abstract

Microwave (MW) heating and sintering of Ni-based bulk metallic glass matrix composite, consisting of gas-atomized Ni 52:5 Zr 15 Nb 10 Ti 15 Pt 7:5 glassy alloy and tin powders, was performed without external pressure by using a single-mode applicator. These powders could be heated well in the magnetic field maximum, but not heated enough in the electric field maximum. A bulk sintered body with the retention of the amorphous phase was obtained below 783 K in an inert atmosphere. The addition of Sn particles promoted the densification of the sintered Ni 52:5 Zr 15 Nb 10 Ti 15 Pt 7:5 glassy specimen. The results suggest that the MW sintering of metallic glasses offers a flexibility of fabricating bulk metallic glasses and metallic glass matrix composites.

Ni-Nb-Sn Bulk Metallic Glass Matrix Composites Fabricated by Microwave-Induced Sintering Process

“…A similar result was also observed in previous studies. [15,16] With an increase of the Sn addition contents, the relative density of obtaining sintered bulk samples increased. Table I gives the measured relative density of the sintered bulk samples containing various Sn addition contents at various sintering temperatures.…”

“…[7,8] The microwave sintering of various metallic powders, steels, and nonferrous alloys produced sintered samples within tens of minutes at sintering temperatures between 1370 and 1570 K. [9][10][11][12] Moreover, nanomaterials and some composite materials were produced by the MW sintering technique. [13][14][15][16][17][18] The Ni-based bulk metallic glasses (BMGs) exhibit high thermal stability, ultrahigh strength, and excellent corrosion resistance. [19] Recently, Ni-based BMG rods with diameters up to 2 to 5 mm in various Ni-based metal-metal alloy systems were produced using a Cu mold casting technique; [20][21][22][23] those with a diameter of 15 mm in the metal-metalloid Ni-Pd-P-B alloy system were prepared by a water quenching technique along with flux treatment.…”

“…We have fabricated some Ni-and Zr-based BMGs and their composites by the MW heating process [15][16][17][18]25] as well as by a spark plasma sintering process. [26][27][28][29][30] Recently, a three-component Ni-Nb-Sn system with high thermal stability and high strength ranging up to 3.8 GPa was reported.…”

Analysis of Electromagnetic Field Distributions in a 915 MHZ Single-Mode Microwave Applicator

“…Recently, we attempted to consolidate Ni-based metallic glass alloy powders and its mixed powders blended with crystalline particulates by the microwave-induced heating and sintering process [14][15][16][17]. It was shown that heating was more efficient in a magnetic field.…”

Glass Formation in a Ni-Based Multicomponent Alloy by Mechanical Milling and Microwave Treatment of The Obtained Powders

“…18,19) Especially microwave radiation has also been successfully used for heating metallic glassy powders and their mixed powders blended with crystalline particulates without pressure. [20][21][22] Compared to conventional heating and sintering, microwave heating can provide some significant advantages such as direct volumetric heating, substantial energy savings, reduction in processing time and lower environmental hazards.…”